Question

Află numerele x şi y, ştiind că suma lor este 53 248,iar diferența lor 7 000

Answer 1

x+y= 53248⇒x=53248-y
x-y=7000
53248-y-y=7000
53248-2y=7000
2y=46248
y=23124

x=53248-23124 =30124 

Answer 2

[tex]Formam~un~sistem:\\ \left \{ {{x+y=53248} \atop {x-y=7000} \right. \\ ------\\ 2x=60248=\ \textgreater \ x=60248:2=\ \textgreater \ x=30124\\ 30124+y=53248=\ \textgreater \ y=53248-30124=\ \textgreater \ y=23124\\\\ Proba:23124+30124=53248\\ ~~~~~~~~~~~~30124-23124=7000[/tex]